River: ($1.60) 4d (2 players)
Hero bets $9.40, MP calls $9.40 all in - Best river card in the deck (outside of the 5d, perhaps). If he was drawing to the flush, he's folding whatever I bet. But if he's holding a Jx hand, he has to think that he just split the pot with me. In his mind, there's only one hand that beats him, and it's so unlikely that I runner runnered quads here... Therefore, $9.4 into $1.6!